twineconvert
Free · in-browser · no upload

IFC to glTF (.glb)
Converter

Drop your IFC file. We'll convert it to glTF right here in your browser, your file never leaves your device.

Local

Drop your file here

or click to pick from your device

.ifc
Nothing uploaded No file size cap Open source

How it works

Three steps. No upload, no signup.

  1. 1

    Drop your file

    Click the dropzone above or drag a IFC from your desktop. Files of any size, there's no upload, so there's no upload limit.

  2. 2

    Convert in your browser

    The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.

  3. 3

    Download

    Get your glTF the moment the conversion finishes. Convert another, or close the tab.

Files stay on your device

Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.

No file size limit

Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.

Free, no signup, no ads on conversions

No account required. No watermark on the output. No queue. Open source, every line of conversion code is public.

Formats involved

About IFC and glTF

IFC, Industry Foundation Classes

IFC is the open BIM (Building Information Modeling) interchange standard maintained by buildingSMART. Used by every major AEC software, Revit, ArchiCAD, AutoCAD, Tekla, Bentley, to exchange architectural and structural model data. The format is text-based STEP (ISO 10303), verbose but human-readable. The current spec is IFC 4.3 (released 2024).

How to open

Revit, ArchiCAD, AutoCAD, Tekla, Bentley OpenBuildings. Free viewers: BIMcollab Zoom, IFC++, BIMVision, Solibri Anywhere.

Full IFC format guide →
glTF, GL Transmission Format

glTF ("the JPEG of 3D") is the runtime asset format for 3D scenes, designed by Khronos for fast loading in web/AR/VR applications. Two flavors: .gltf (JSON + external textures) and .glb (binary, single-file, what we produce here). Native viewer support in macOS/iOS Quick Look, Windows 3D Viewer, every modern browser via three.js or babylon.js.

How to open

macOS / iOS Quick Look, Windows 3D Viewer, every WebGL/WebGPU 3D viewer (Three.js, Babylon.js), Blender (with importer), every game engine.

Full glTF format guide →

Convert your IFC to other formats

How we compare

IFC → glTF (.glb) vs the alternatives

FeatureUstwineconvertCloudConvertiLovePDFFreeConvertSmallpdf
Files uploaded to a server
Free file size limitNo limit1 GB200 MB1 GB5 GB
Free conversions per dayUnlimited10/dayLimitedLimited2/day
Signup required
Watermark on output
Open source
Works offline (after first load)

Last verified May 2026 from each competitor's pricing and FAQ pages. Limits and pricing change frequently.

FAQ

Common questions

Is this IFC → glTF (.glb) converter really free?

Yes. No signup, no watermark, no daily file count limit. The entire engine is open source, you can read the conversion code on GitHub.

Where does my file go when I convert it?

Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.

What's the maximum file size?

Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.

Why convert IFC to glTF?

Architectural/structural BIM model interchange between disciplines. 3D model delivery to web/AR/VR/game engines. The most common reason to convert is compatibility, glTF works in places where IFC doesn't, or vice versa.

How do I open a IFC file in the first place?

Revit, ArchiCAD, AutoCAD, Tekla, Bentley OpenBuildings. Free viewers: BIMcollab Zoom, IFC++, BIMVision, Solibri Anywhere.

Does this work offline?

Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.

Can I convert multiple files at once?

Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.